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Author(s): |
A.X. Wu, University of Science & Technology Beijing, China,
S.H. Yin, University of Science & Technology Beijing, China,
J.Z. Liu, Shanghai Ocean University, China,
W.J. Wang, University of Science & Technology Beijing, China,
H.Z. Jiao, University of Science & Technology Beijing, China, |
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Abstract: |
Extracting valuable minerals from the earth inevitably leads to two main side effects: the accumulationof waste tailings on the ground surface and the creation of underground large voids. Paste filling technologyis the critical resort for green mining and cleaner production in mining industry. The paste filling systemin both JinChuan Nickel Mine and TongLuShan Copper Mine has been presented. The research and applicationof paste filling in ChiHong Mine has been analyzed. The composition of paste and mix proportionwas determined by investigation on the material properties. Flow loop was conducted to investigate the factorsaffecting one-way resistance, the suggestion value of which was 8MPa/km. During practice in ChiHong,deep-cone thickener was used as one-part dehydration for unclassified tailing dewatering, and cement wasadded on ground without water. Two-stage horizontal continuous mixer was used for paste preparation. Totalhydraulictwin-piston pump was selected for paste transportation. The advanced Distributed Control System(DCS) was selected as well. The filling system was applied successfully in ChiHong. The paste concentrationreached 78-81%, and the filling capacity is 1264m3/day. The compressive strength of the backfill exceeded7MPa after 28 days, and the cost is only 25 dollar/m3. Furthermore, the current problems faced by the fillingsystem were analyzed in this paper, and reasonable methods for addressing those problems have also been putforward.
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